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SURGE SURGE SURGE SURGE PROTECTIONPROTECTIONPROTECTIONPROTECTION
5. Protect incoming AC power feeders
6 Protect low voltage data/telecommunication circuits6. Protect low voltage data/telecommunication circuits.
Standards – LP and SP
Standard TitleIEC 62305-1 Protection Against Lightning - Part 1: General PrinciplesIEC 62305-2 Protection Against Lightning - Part 2: Risk Management IEC 62305-3 Protection Against Lightning - Part 3: Physical Damage to Structures and Life Hazard IEC 62305-4 Protection Against Lightning - Part 4: Electrical and Electronic Systems within StructuresIEC 61643-1 Low-Voltage SPDs - Part 1: SPDs Connected to Low-Voltage Power Distribution Systems - Requirements and Tests IEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application PrinciplesIEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application Principles IEC 61643-21 Low Voltage SPDs - Part 21: SPDs Connected to Telecommunications and Signalling Networks - Performance Requirements and Testing MethodsIEC 61643-22 Low-Voltage SPDs - Part 22: SPDs Connected to Telecommunications and Signalling Networks - Selection and Application PrinciplesIEC 61643-311 Components for Low-Voltage Surge Protective Devices - Part 311: Specification for Gas Discharge Tubes (GDT) IEC 61643-321 Components for Low-Voltage Surge Protective Devices - Part 321: Specifications for Avalanche Breakdown Diode (ABD) IEC 61643-331 Components for Low-Voltage Surge Protective Devices - Part 331: Specification for Metal Oxide Varistors (MOV) IEC 61643 341IEC 61643-341 Components for Low-Voltage Surge Protective Devices - Part 341: Specification for Thyristor Surge Suppressors (TSS)BS 6651 Now Replaced by BS EN 62305 Series!BS EN 50164-1 Lightning Protection Components (LPC) - Part 1:Requirements for Connection Components BS EN 50164-2 Lightning Protection Components (LPC) - Part 2: Requirements for Conductors And Earth Electrodes BS EN 50164-3 Lightning Protection Components (LPC) - Part 3: Requirements for Isolating Spark GapsIEEE C62.41.1 Guide on the Surge Environment in Low-Voltage (1000 V And Less) AC Power Circuits IEEE C62.41.2 Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power CircuitsIEEE C62.45 Recommended Practice on Surge Testing for Equipment Connected to Low-Voltage (1000 V And Less) AC Power CircuitsIEEE C62.43 Guide for the Application of Surge Protectors Used in Low-Voltage Data, Communications, and Signaling CircuitsIEEE C62.72 Guide for the Application of Surge-Protective Devices for Low-Voltage (1000 V or Less) AC Power CircuitsIEEE C62.xx.yy Many, many additional Surge Standards, especially on ComponentsUL 1449 Transient Voltage Surge SuppressorsUL 1449 Transient Voltage Surge SuppressorsNFPA 780 Standard for the Installation of Lightning Protection SystemsUL 96A Installation Requirements for Lightning Protection SystemsUL 96 Lightning Protection ComponentsAS/NZS 1768 Lightning Protection [and Surge Protection]ITU K series Many standards for testing and applications for Telecoms Protection
Standards – Surge Protectiong
Standard TitleIEC 62305-1 Protection Against Lightning - Part 1: General PrinciplesIEC 62305-4 Protection Against Lightning - Part 4: Electrical and Electronic Systems within StructuresIEC 61643-1 Low-Voltage SPDs - Part 1: SPDs Connected to Low-Voltage Power Distribution Systems - Requirements and Tests IEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application Principles IEC 61643-22 Low-Voltage SPDs - Part 22: SPDs Connected to Telecommunications and Signalling Networks - Selection and Application PrinciplesIEEE C62.41.2 Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power CircuitsUL 1449 Transient Voltage Surge SuppressorsAS/NZS 1768 Lightning Protection [and Surge Protection]
Consequences of unprotected Power Systems!Power Systems!
Consequences of unprotected Power Systems!Power Systems!
Insulation failure due to overvoltage surge
Why are SURGES a problem?problem?
Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:
Increased equipment sensitivitysensitivityExpense of lost production - downproduction down timeLitigation andLitigation and insurance expense
Surge Protection
How surges enter facilities - incomingHow surges enter facilities incoming
Surge Protection
HHow surges enter facilities –
Earth Potential RiseRise
Surge Protection
Typical Surge Waveforms
SPD Definition
Surge Protective Device (SPD)Surge Protective Device (SPD)
Device that is intended to:
- limit transient overvoltages, and
- divert surge currents.
It contains at least one non-linear component.[definition 3.1 of IEC 61643-1]
Also: Transient Voltage Surge SuppressorS rge ArresterSurge ArresterSurge Protector
SPD Components – “Voltage Limiting” and “Voltage Switching”and “Voltage Switching”
SPD Components – voltage limiting
VaristorsVaristors
MostMost commonly Metal OxideMetal Oxide Varistors(MOVs)(MOVs)
SPD Components – voltage limiting
Solid StateSolid State Devices
Zener diodes, f l d tformuled to handle surge energyenergy “Transorbs”
Also, thyristors
SPD Components – voltage switching
GasGas Discharge Tubes (GDTs)
Inert gas between two
l t delectrodes
SPD Components – voltage switching
Spark GapsSpark Gaps
An air gapAn air gap formed between twobetween two closely spaced electrodeselectrodes
SPD Components – characteristics
(Can combine for the best of each)
SPD Components – characteristics
SPD Components – characteristics
SPD Responses
RESPONSE OFVOLTAGE LIMITING
TYPE OF SPD
SPD Responses
RESPONSE OFVOLTAGE SWITCHING
TYPE OF SPD
SPD Responses
RESPONSE OFONE-PORT COMBINATION
TYPE OF SPD
SPD Responses
RESPONSE OFTWO-PORT COMBINATION
TYPE OF SPD
SPD Responses
RESPONSE OF TWO-PORT VOLTAGE LIMITINGTYPE OF SPD WITH FILTERING
SPD Configuration – one port
Common input/output Separate input/output
SHUNT (ONE-PORT) PROTECTORS
SPD Configuration – two port
Surge Filter Signal Line SPD
SERIES (TWO-PORT) PROTECTORS
SPD Configuration - MSPD
MULTI-SERVICE PROTECTION DEVICEMULTI-SERVICE PROTECTION DEVICE
Protection modes
Common Mode(Longitudinal)
Differential Mode(Transverse)(Longitudinal) (Transverse)
CCAC Power Line AC Power Line PROTECTIONPROTECTIONPROTECTIONPROTECTION
5. Protect incoming AC power feeders
SURGE AND TRANSIENT PROTECTIONPROTECTION
A Surge Protector needs:
• A good Surge Rating (8/20us).• Handles Lightning surges• Provides a good lifetime• Provides a good lifetime
• A low Let-through voltage.• Protects the equipment• Protects the equipment.
• To be able to handle Temporary Over Voltage (TOV)Over Voltage (TOV)
• So it behave safely during high AC over voltages
Surge Current Ratingsg g
Wh t S C t R ti d IWhat Surge Current Rating do I need?
Let’s look at what the standardsLet’s look at what the standards tell us
Surge Current Ratingsg g
Surge Current Ratingsg g
Attenuated Surge Currents (Incoming surges)
IEC Test Class II (8/20us)
Partial Direct Lightning Currents (Outgoing surges)
IEC Test Class I (10/350us) IEC Test Class II (8/20us)
IEEE Scenario I
IEC Test Class I (10/350us)
IEEE Scenario II
Surge Current Ratings
Standard Service Entrance Sub Panel Socket Outlet
g g
Flashes to the structure/LPS(outgoing surges)
Surges due to flashes to services(incoming surges)
IEEEC62.41.2 - 2002
Cat C Cat B Cat A
Scenario II Scenario IScenario II Scenario I10kA, 10/350us100kA, 8/20us
10kA, 8/20us L-N3kA, 8/20us N-G (non-MEN) 3kA, 8/20us 500A, 8/20us
IEC62305-1 (2006) 25kA, 10/350us 10kA, 10/350us (direct flash)
5kA 8/20us (nearby flash)200A, 8/20us
62305-4 (2006) 5kA, 8/20us (nearby flash)
AS/NZS1768 - 2007
Cat C3 Cat C1 Cat B Cat A
50kA, 8/20us 10kA, 8/20us 3kA, 8/20us 500A, 8/20us
RecommendedSPD Rating
100kA, 8/20us 40kA, 8/20us 10-40kA, 8/20us 3-10kA, 8/20us
There is still not complete agreement or consensus on this matter:There is still not complete agreement or consensus on this matter:• IEC values are given in “Informative” (not Normative) Annex to standard• IEEE standard has Annex expressing misgivings about the Scenario II values
Surge Current Ratingsg g
RECOMMENDED SURGE RATINGS
LOCATION Exposed locations, orbuilding has LPS
Less exposed,built-up area
Feeders and short branch circuits
Outlets and longbranch circuits
FOR A.C. POWER SYSTEM SPDs PER PHASE
RecommendedSPD Rating 100kA, 8/20us 40kA, 8/20us 10-40kA, 8/20us 3-10kA, 8/20us
g p
MOV Surge Lifetimeg8/20μs
MOV Surge Lifetimeg
1000010000
(kA
) A 10:1 reduction in surge current, gives 1000 times more life
1000
urre
nt ( 1000 times more life
100
urge
Cu
A halving of surge
101 10 100 1000 10000 100000 1000000
S current, gives 8 times more life
1 10 100 1000 10000 100000 1000000
Number of impulses (8/20us)
MOV Surge Lifetimeg
Can PARALLEL MOV’s t i ff tito increase effective surge capacity and increase lifetime.
200kA MOV material
MOV Surge Lifetimeg
Equipment i tibilitresistibility
ITI (CBEMA) Curve
Information Technology Industry Council
ITI (CBEMA) Curve
Industry Council (ITI,formerly known as the Computer & Business Equipment Manufacturers A i i )Association)
Strictly – only applies to 120V systems, but often y ,taken to apply to 220V or 240V systems.
MOV CLAMPING (Let-through)( g )
1500
MOV CLAMPING (Let-through)( g )
Let-through voltage depends on the surge applied, and other factors such as g pp ,lead length.For a 220-240V system a let-throughFor a 220 240V system, a let through voltage of approximately 700V to 850Vis good (at 3kA 8/20us)is good (at 3kA, 8/20us).
8/20μs BUT – not so low that TOV becomes a problem!becomes a problem!
What is TOV?
TEMPORARY OVER-VOLTAGE
Source: Electronic Buyers News
TEMPORARY OVER-VOLTAGE
SPD in Conduction TOV Condition
Nominal AC MainsOperating Voltage
Nominal ClampingVoltage on 50/60 Hz
Operating Voltage
TEMPORARY OVER-VOLTAGE
Wh MOV i bj d O l i b i dWhen a MOV is subjected to Over-voltage, it begins to conduct current.
This causes energy to be dissipated in the MOV and eventually causes it
t f il t i ll t Sh t Ci itto fail, typically to a Short Circuit.
This causes a large amount of Current to flow into the failing product, only
li it d b th P S l ’ bilit t d li t (P tilimited by the Power Supply’s ability to deliver current (Prospective
Short Circuit Current).
Th d t th ft “bl ” i it i i d t ti lThe product then often “blows” open circuit causing arcing and potential
fire hazard.
A d i h ll i t id thi l i fi h d!A design challenge is to avoid this explosive fire hazard!
UL 1449 over-voltage tests
A 7 hour safety test with full phase voltage.That is, 240V products used on 240/415V systems are tested with 415V415VThe product can fail, but must fail safely (not catch fire, or cause a fire)
Passing UL Over Voltage test
High voltage MOV'sIncreased voltage let-through to equipment!Increased voltage let through to equipment!
Thermal fusesSafe, but permanently disconnects protection!
TD technologyMeets UL requirements and continues to provide transient protection after an overprovide transient protection after an over-voltage event
TRANSIENT DISCRIMINATINGTechnologyTechnology
TRANSIENT DISCRIMINATINGTechnologyTechnology
Low SPDvoltage clamping
TD technology.clamping
Transient Discriminating MOVTECMOVTEC
TDS-MPM
TDS-MOVTEC
Thermal Fusing
Thi h h h f h f ili SPD di iThis approach uses the heat of the failing SPD to cause a disconnection to
occur. This is usually accomplished by allowing a soldered connection
to melt and spring opento melt and spring open.
Thermal Fusing
Overcurrent Fusing
This approach uses a more familiar fuse to disconnect the product. The fuse used pp p
here is a special design that:
1) Has high Current Interrupting Capacity (kAIC)
2) Will pass high surge currents, but
3) Will open quickly on AC follow-on currents!
Product Testing
Standard UL 1449 is widely regarded as the standard imposing the mostStandard UL 1449 is widely regarded as the standard imposing the most
stringent test requirements to ensure product safety.
It has three types of Abnormal Overvoltage tests, that involve applying the yp g pp y g
overvoltage, and limiting the following current to different values to
ensure correct operation over a wide range of conditions:
1) Low current: 5A to 10A (we use THERMAL FUSING)
2) Intermediate Current: 500A to 1000A (we use OVERCURRENT FUSING)
3) Maximum Current: Manufacturer decides how high to go. We have
chosen to go to the maximum – 200,000A (we use OVERCURRENT
FUSING).
AbnormalOver voltageOver-voltage
Abnormal Over voltage applied withAbnormal Over-voltage applied, with500A limited current(FUSES SHORTED OUT)
AbnormalOver voltage
Abnormal Over voltage applied with
Over-voltage
Abnormal Over-voltage applied, with500A limited current(FUSES active)
Abnormal Over-Voltagewith high SSCRwith high SSCR
Abnormal Over voltage applied withAbnormal Over-voltage applied, with200,000A prospective current(FUSES SHORTED OUT)
Abnormal Over-Voltagewith high SSCR
Abnormal Over voltage applied with
with high SSCR
Abnormal Over-voltage applied, with200,000A prospective current(FUSES active)
The three safetytechnologiestechnologies
Problem Solution
Temporary over-voltage
Problem Solution
Aged MOV
Excess surge current
IEC 61643-1 Table B.1TOV test valuesTOV test values
Application TOV test values UT (Volts)pp TOV test values UT (Volts)SPDs connected to For 5 s
(LV-system faults)For 200 ms
(HV-system faults)(LV system faults) (HV system faults)
TN, TT and IT-systems
C t d L PE 1 71 * U0 1200 + U0Connected L-PE 1.71 * U0 1200 + U0
Connected L-(PE) N 1.45 * U0
Connected N-PE 1200Connected L-L
SPD Testing – General
General Mechanical and Electrical
Environmental requirements
Terminals mechanical requirementsTerminals – mechanical requirements
Protection against direct contact
Mechanical strength
Heat and Fire resistance
Electrical isolation between circuits
Earth Leakage
Insulation resistance
IEC Parameters of an SPD
Uc – Maximum Continuous Operating VoltageUc Maximum Continuous Operating Voltage
Up – Voltage Protection Level
Iimp – Maximum Surge Current (10/350us)p
[Test class I]
Imax – Maximum Surge Current (8/20us)
[Test class I and II]
In – Nominal Surge Current (8/20us)
[T t l II][Test class II]
Uoc – Open circuit voltage of test impulse
[Test class III][Test class III]
IL – Rated Load Current
UL Parameters of an SPD
MCOV Maximum Continuous Operating VoltageMCOV – Maximum Continuous Operating Voltage
SVR Ratings – Suppressed Voltage Rating (let-
through voltage measured at 6kV 1.2/50us, 500A
8/20us)
Short Circuit Rating – Declared by manufacturer
and used for TOV and other tests
Rated line voltage
Rated CurrentRated Current
New UL1449 Edition 3T t R i tTest Requirements
UL will now test and label In rating (15 shot 8/20us rating)
VPLSVR replaced with VPL – a Cat B 6kV/3kA “Let-through” Voltage Test
Requirement for additional tests for product safety under abnormal over voltage tests (SSCR)
SPD Testing – series SPD’s
Tests for two-port SPDs and one-port SPDs with separate input/output terminals
Voltage Regulationg g
Rated Load Current
Load-side Short CircuitsLoad-side Short Circuits
Load-side surge withstand
bilitcapability
Overload Behaviour
SPD Status Indication
M h i lElectrical
Mechanical indication
indication (LED’s)
AudibleAudible
AlarmAlarm Contacts
Installation of SPD’s
SPD Installation –d f t timodes of protection
SPD Installation –d f t timodes of protection
SPD Installation –AC P S tAC Power Systems
Before applying SPD’s to AC Power Systems, we first
need to determine the type of power system,
commonly:
TN-CTN-C
TN-S
TN-C-S
TT
TN-C Power System
In this the neutral and protective earth conductor combine in a single conductor throughoutIn this, the neutral and protective earth conductor combine in a single conductor throughout the system. All exposed-conductive-parts are connected to the PEN conductor.
TN-S Power System
In this, a separate neutral and protective earth conductor are run throughout. The protective PE conductor can be the metallic sheath of the power distribution cable or a separate conductor Allconductor can be the metallic sheath of the power distribution cable or a separate conductor. All exposed-conductive-parts of the installation are connected to this PE conductor.
TN-C-S Power System
In this, a separate neutral and protective earth combine in a single PEN conductor. This system is also known as a Multiple Earthed Neutral (MEN) system and the protective conductor is referred toalso known as a Multiple Earthed Neutral (MEN) system and the protective conductor is referred to as the Combined Neutral Earth (CNE) conductor. The supply PEN conductor is earthed at a number of points throughout the network and generally as close to the consumer’s point-of-entry as possible. All exposed-conductive-parts are connected to the CNE conductor.
TT Power System
A system having one point of the source of energy earthed and the exposed-conductive-parts of the installation connected to independent earthed electrodesinstallation connected to independent earthed electrodes.
SPD Installation - Coordination
(Inductor or Building Cable)
P i SPD S d SPD
(Inductor or Building Cable)
Primary SPD Secondary SPD
Primary SPD Diverts CurrentSecondary SPD Limits VoltageSecondary SPD Limits Voltage
SPD Installation - Coordination
SPD Installation - Fusingg
SSPD
SPD Installation – RCDs (ELCBs)( )
S SSPD
SPD
SPD Installation – Wiringg
S SSPD
SPD
SPD Installation – Wiringg
SPD
SPD
SPDD D
SPD Installation – Wiringg
SPD Installation – Wiringg
SPD Installation – Wiringg
ApproximatelyApproximately 4 metres of
wiring length
Line routing and line shieldingg g
U t t d tUnprotected system
Line routing and line shieldingg g
Reducing the magnetic field inside an inner LPZ by its spatial shieldspatial shield
Line routing and line shieldingg g
Reducing the influence of the field on lines by line shieldingline shielding
Line routing and line shieldingg g
Reducing the induction loop area by suitable line routingline routing
DIN Rail mountedDIN Rail mountedSurge ProtectorsSurge Protectors
CRITEC Productsfor the IEC Systemfor the IEC System
50kA
100kA10/350us
50kA10/350us
CRITEC Productsfor the IEC Systemfor the IEC System
5kA
60kA8/20us
5kA10/350us
8/20us
10kA 100kA10kA10/350us
100kA8/20us
10kA
40kA8/20us
8/20us
CRITEC DIN Rail Mount TDS SeriesTDS Series
50kA100kA 8/20μs50kA
8/20μs8/20μs
Replaceable modules
TT system
50kA 8/20μs
Alarm contacts
Various voltages
Spark
Gap
N E
TNC system
50kA 8/20
N-E
50kA 8/20μs
CRITEC TDS-SCSurge CounterSurge Counter
The TDX Modular Product RangeProduct Range
TDX ModularCommon SpecificationsCommon Specifications
Incorporate the three safety technologies:technologies:
TD™ technologyThermal protectionOver-current protection
200kAIC ratingEMI/RFI filteringMetal NEMA 4 enclosure
CRITEC TDX100M and TDX200M SpecificationsTDX200M Specifications
Modular TD™
“Plug-able”Available in Wye or Delta Three Phase configurationsAll mode or TT models (TT for Asia)Alarm ContactsOptional surge counter
TDX100M100kA 8/20usper phase TDX200Mper phase TDX200M
200kA 8/20usper phase
CRITEC TDX200M Typical Panel InstallationTypical Panel Installation
The TDX Compact Product RangeProduct Range
TDX CompactCommon SpecificationsCommon Specifications
Compact TD™
Single or Three Phase WyeSingle or Three Phase Wye configurationsAll mode protectionpMetal NEMA 4 enclosure50 or 100kA 8/20 per Phase50 or 100kA 8/20 per Phase200kAIC rating
CRITEC TDX100M and TDX50C Typical Panel InstallationTypical Panel Installation
Surge Filtering
HOW TO CONTROL THE VOLTAGETO YOUR EQUIPMENTTO YOUR EQUIPMENT
Series Connected DeviceSeries Connected Device
Wavefront slowed
Energy diverted and filtered
Sized based on load current
Lower let-through voltage
Ideal for electronics,Ideal for electronics,
computing & communications
equipment - fine protectionequipment fine protection
Triggered Spark Gap Technology
Designed to overcome problemsassociated with “Long Tail Pulses”g
Enhanced Spark Gap Technology combined with TDS Technology provides the building blocksbuilding blocks for the future of effective surgethe future of effective surge protection
Internal Workings – Sectional Viewg
Typical Performance
TSG1130-2S – Cat B. 6kV/3kA Test Results
Curve 1 –“Let-through Voltage”(1.4kV)
Curve 2 –Curve 2 –“Input Surge Current”(3kA, 8/20us)( , )
TSG1130-2S – Cat C. 6kV/20kA Test ResultsTest Results
Curve 1 –
“Let-through Voltage”
Max. 1.9kVpeak
Curve 2 –
“Input Surge Current”
TSG-SRF363 – Cat C. 6kV/20kA Test Results
Curve 1 –
“Let-through Voltage”
Max 230Vpeak
Curve 2 –
“Input Surge Current”Input Surge Current
20kA
SURGE REDUCTION FILTERSURGE REDUCTION FILTER
SRF INSTALLEDINSTALLED
Modular DIN Rail SRF’s
Modular DIN Rail SRF’s
Load Segregation –use TSG-SRF on sensitive loads only
SPD Filteringg
Conventional RFI filters DO NOT function well as SPDfunction well as SPD filters, due to the frequencies involved
Telephone and Telephone and Data Line Data Line
PROTECTIONPROTECTIONPROTECTIONPROTECTION6. Protect low voltage data/telecommunication circuits.
Consequence of unprotected data circuits!data circuits!
Consequence of unprotected low voltage data circuits!low voltage data circuits!
Damage - Fire Alarm Systems
Damage - Lift Control Systems
Effects Of Transients On Electronic EquipmentOn Electronic Equipment
Case Study: US AirCase Study: US Air Force
Average of 6 boardsAverage of 6 boards per week are lost to lightning transients
Source: Texas Instruments
HYBRID DATA CIRCUIT PERFORMANCEPERFORMANCE
TLP CONFIGURATIONS
Single Stage CircuitSingle Stage CircuitSingle Stage CircuitSingle Stage CircuitCRITEC SLP10CRITEC SLP10--K1FK1F
CircuitCircuit PerformancePerformancePerformancePerformanceTypical response to 5kV, 125A Typical response to 5kV, 125A
10/700µs CCITT10/700µs CCITT--K17 pulseK17 pulse
TLP CONFIGURATIONS
Multi Stage CircuitMulti Stage CircuitMulti Stage Circuit Multi Stage Circuit CRITEC HSP10CRITEC HSP10--K230, HSP10K230, HSP10--K72K72
CircuitCircuit PerformancePerformancePerformancePerformanceTypical response to 5kV, 125A Typical response to 5kV, 125A
10/700µs CCITT10/700µs CCITT--K17 pulseK17 pulse
Telecoms Systems:Systems:
TELECOMMUNICATIONS PROTECTIONPROTECTION
DATA LINEPROTECTIONPROTECTION
UTB SeriesUniversal Transient Barrier
The UTB employs a hybrid, three stage clamping circuit, to ensure the best
ibl t ti t itipossible protection to sensitive electronic equipment while maintaining a minimum of line interference and insertion lossesinsertion losses
Imax (8/20us) = 20 kAImax (8/20us) 20 kA
UTB SeriesUniversal Transient Barrier
Resettable PTCs Series Coordinating provide overcurrent protection
gElements
Stage 1: Gas Tube with shorting bar -primary surge and mains incursion
Stage 2: Metal Oxide Varistors – intermediate protection
Stage 3: Silicon Avalanche Diodes – fine protectionmains incursion
protectionprotection protection
Clamping performanceof a UTB-5 transient barrierof a UTB 5 transient barrier
k k li d i l
Applied pulse of 6kV 1.2/50us, 3kA 8/20us, is clamped to <13V
ANSI C62.41 6kV 3kA applied impulse
Clamped to <13V
Universal Transient Barriers used in SCADA protectionused in SCADA protection
New UTB’s
New UTB’s
U i l T i B i 1 D P i (1 P i ) I 1 A I 20kAUniversal Transient Barrier, 1 x Data Protection (1 x Pair), IL 1.5A, Imax 20kA UTB5S UTB, Compact, 1pair, Un 5V, IL 1.5A, Imax 20kA UTB15S UTB, Compact, 1pair, Un 15V, IL 1.5A, Imax 20kA UTB30S UTB, Compact, 1pair, Un 30V, IL 1.5A, Imax 20kA UTB60S UTB, Compact, 1pair, Un 60V, IL 1.5A, Imax 20kA UTB110S UTB, Compact, 1pair, Un 110V, IL 1.5A, Imax 20kA
Employ a hybrid, three stageEmploy a hybrid, three stage clamping circuit to help ensure the best possible protection to sensitive electronic equipment while
i t i i i i f limaintaining a minimum of line interference and insertion losses.
Full UTB Circuit, includes PTC, 1.5A rating but slimmer (12mm)rating, but slimmer (12mm).
110V version omits PTC’s.
New UTB’s
U i l T i B i 2 D P i (2 P i ) I 800 A I 20kAUniversal Transient Barrier, 2 x Data Protection (2 x Pair), IL 800mA, Imax 20kA UTB5D UTB, Compact, 2pair, Un 5V, IL 800mA, Imax 20kA UTB15D UTB, Compact, 2pair, Un 15V, IL 800mA, Imax 20kA UTB30D UTB, Compact, 2pair, Un 30V, IL 800mA, Imax 20kA UTB60D UTB, Compact, 2pair, Un 60V, IL 800mA, Imax 20kA UTB110D UTB, Compact, 2pair, Un 110V, IL 800mA, Imax 20kA
Employ a hybrid, three stage clamping circuit to help ensure the best possible protection to sensitive electronic equipment while maintaining a minimum of line interference and insertion lossesand insertion losses.
Each circuit omits PTC’s, some series components, and has reduced current rating to 800mAto 800mA.
But each circuit effectively 6mm wide
No replaceable modules
New UTB’s
U i l T i B i 1 D P i 1 PSU P i I 20kA
Specifically designed for applications
Universal Transient Barrier, 1 x Data Protection, 1 x PSU Protection, Imax 20kA UTB30PS UTB, Dual, Un 30V, IL 800mA, 12/24VDC, IL 5A
Spec ca y des g ed o app ca o swhere compact protection is required for one signal pair and one power supply, common in powered transducer applicationstransducer applications.
Combines a UTB-30 type circuit, with 12/24V supply protection.
UTB-30 circuit – same as for “D”ouble UTB’s
Power supply protection, uses thermally protected MOVs, and handles 5A.
New UTB’s
Universal Transient Barrier, Potential Equaliser, Imax 20kA
Generally designed for a variety of
, q , UTBMP UTB, Compact, 2pair, MultiPurpose Equaliser, 5A
applications, including course protection, signal ground bonding or higher current applications.
Uses 2 x 230V GDT’s.
Multi Purpose applications:
• Through connectionsThrough connections
• Potential equalisers (shield/screen to earth)
B i t ti f 2 t• Basic protection for 2 ccts
• 5A per line rating
AS/NZS1768 – Examples for SPD’sCentral PLC and Remote Sensor
CENTRALCENTRAL FACILITY
LEGEND:MSB = Main Switch BoardMDF = Main Distribution FrameMEB = Main Earth BarBB = Bonding BarPLC = Programmable Logic Controller
SPD MODEM
OPERATOR CONSOLE
REMOTE SENSOR
SIGNAL LINE(S)
LOCAL SENSOR
MSB
MDF
SPDTELECOM
PLC = Programmable Logic Controller
SPDPLC
SPD MODEMSPD SPD
SIGNAL LINE(S)
MEBSPD
BB
MSBAC POWER
Multi-storey buildingWith PABXWith PABX onUpper Floor
PABX
SECOND FLOOR
EB
SPD
BB
DBIDF
SPD
SPDINTERNAL
EXTENSIONS
EXTERNAL EXTENSIONS
FIRST FLOOR
MDF
SPD
SPD
GROUND FLOOR
TELECOMS SERVICE
MEB
SPD
BB
MSBAC POWER
LEGEND:MSB = Main Switch BoardDB = Distribution BoardMDF = Main Distribution FrameIDF = Intermediate Distribution FrameMEB = Main Earth Bar; BB = Bonding BarPABX = Private Automatic Branch Exchange
A Domestic Computerand ADSL Modem
Fax
SPD
TELECOMS SERVICE
MPSD
Voice
ADSL
Telecoms Socket
SPDSBAC POWER
Modem Monitor PC Printer ScannerPower Socket
MPSD POWER BOARD
LEGENDLEGEND:SB = Switch BoardMPSD = Multi-service Surge Protection DeviceADSL = Asynchronous Digital Subscriber Line
Rooftop CellularROOFTOP CABIN
SPD
Base Station SPD DBEQPT
TO BLDG LPSBB
AC POWER
MEB
SPDMSB
LEGEND:MSB = Main Switch Board; DB = Distribution BoardMEB = Main Earth Bar; BB = Bonding Bar
ERICO SURGE PRODUCTS
Let’s look at some surge products:
• Primary (Point of Entry) – Shunty ( y)
• Primary (Point of Entry) – Series
• Secondary (Sub-panel) Shunt• Secondary (Sub-panel) – Shunt
• Secondary (Sub-panel) – Series
T l i ti P t t• Telecommunications Protectors
• Data/Signaling Protectors
SURGE PRODUCTS(AC POWER)(AC POWER)
Primary (Point of Entry) - Shunt (1)
TDS-MPM
TDX
TDS-MOVTEC
SURGE PRODUCTS(AC POWER)(AC POWER)
Primary (Point of Entry) - Shunt (2)
TSG DSD
TDS350
SURGE PRODUCTS(AC POWER)(AC POWER)
P i (P i t f E t ) S iPrimary (Point of Entry) - Series
Modular SRF
TSG-SRF
SURGE PRODUCTS(AC POWER)(AC POWER)
S d (S b l) Sh tSecondary (Sub-panel) - Shunt
DSDTDS
DSD
SURGE PRODUCTS(AC POWER)(AC POWER)
S d (S b l) S iSecondary (Sub-panel) - Series
TDF and DSF
PLF
SURGE PRODUCTS(Telecoms, Data)(Telecoms, Data)
Telecommunications Protectors
SLP and HSP DLT (for SLP SLP and HSP and HSP) UTB-S
SURGE PRODUCTS(Telecoms, Data)(Telecoms, Data)
CSP DEP
CCTV LCP
UTBLAN
ERICOSurge LaboratorySurge Laboratory
160kA 8/20160kA 8/20usor
15kA 10/350us
QUESTION TIMEQUESTION TIMEQUESTION TIMEQUESTION TIME